Attachment for shaving-machines.



F. F. LATTA. ATTACHMENT FOR SHAVING MACHINES.

APPLICATION FlLED JAN.3,I9I1.

Patented. Apr. 27, 1915.

LEETAQZ I HE NORRIS PETERS 60., PHOTO-L!THO.. WASHINGTON. D. C,

s'rnns .er

NT FFICE.

FRANK F. LATTA, OF WADENA, MINNESOTA, ASSIGNOR TO NEW JERSEY PATENT COMPANY, OF WEST ORANGE, NEW JERSEY, A CORPORATION OF NE\V JERSEY.

ATTACHMENT FOR SHAVING-MACHINES.

Application filed January 3, 1911.

To all whom it may concern:

Be it known that I, FRANK F. LATTA, a citizen of the United States, and 'a resident of Wadena, in the county of Wadena and State of Minnesota, have invented certain new and useful Improvements in Attachments for Shaving-Machines, of which the following is a description.

My invention relates to machines for shaving sound records when it is desired to remove the record surface therefrom, in order that a new surface may be presented to be recorded upon, and more particularly to an attachment for such machines whereby a uniform depth for cuts taken by said machine may be secured by persons having little skill in the operation thereof.

It is customary in preparing for a new impression a sound record which contains a record no longer desired, to take two outs over the surface. The first of these is in tended to remove the old record, and the second to finish the surface for a new record. In taking this second cut, there is a tendency to set the cutting tool too deep; so that the wax-like material forming the record, instead of being shaved off smoothly, istorn off; and the resultant surface is full of pin holes. These holes cause a crackling sound when a reproducer is moved over the new surface; and a record out in the newly prepared surface by a recording stylus is accordingly imperfect. WVhen the pin holes are numerous, it is difiicult to understand the record when the latter is reproduced on a phonograph. Furthermore, as it has heretofore been necessary to stop the shaving machine and use considerable care when adjusting the knife for a second cut, considerable time has been necessary for such an adjustment.

My invention has for its object the obviation of the above named objections by the provision of a simple attachment adapted to be readily applied to shaving machines whereby a second or finishing cut of a fixed and predetermined amount may be secured by a simple manipulation of the said attachment without stoppmg the machine.

In order that my invention may be more Specification of Letters Patent.

Patented Apr. 27, 1915.

Serial No. 600,543.

fully understood, attention is hereby directed to the accompanying drawing, forming part of this specification and in which Figure l is a side view of the preferrred form of my improved attachment applied to a well known type of shaving machine, the dotted lines showing the adjustment for a first, or roughing, cut and the solid lines the adjustment for a second, or finishing cut. Fig. 2 is a horizontal section on the line 2-2 of Fig. 1 looking in the direction of the arrow; Fig. 3 is a vertical section taken one the line 3-3 of Fig. 2 and showing my improved attachment in position for a first or roughing out; Fig. 4 is a similar view, but showing my improved attachment in position for a second or finishing cut. Figs. 5 and 6 are perspective views of modifications of my attachment showing in dotted linesthe adjacent portions of a shaving machine; and Figs. 7 and 8 are side views of still another modification, the former view showing my attachment in position for a finishing and the latter view for a roughing out.

In all the views, like parts are designated by the same reference numerals.

Referring to Fig. l, 1 represents the frame of a shaving machine having a mandrel 2 for supporting the record 3. An arm or frame I carries a clamp 5 for adjustably and removably holding the shaving knife 6, the said arm being supported on the back rod 7 and the straight edge 8 of the frame 1,.and being adapted to be moved longitudinally of the record by the feed screw 9 with which cooperates the feed nut 10 carried by the spring support 11 secured to the arm 4 in the manner common in machines of this type.

In the preferred form of my invention, which is shown in Figs. 1 to i inclusive, that portion of the arm l which is adjacent the straight edge 8 is provided with a recess 12 having an opening 12 immediately above said straight edge. In this recess is rotatably mounted a bar 13 having a flattened side 14: adapted to engage the upper face of the straight edge 8 as shown in Fig.

4, when the said bar is in one of its posigage the straight edge 8 as shown in Fig. 3 and raise or cam upwardly theforward por -v tion of the arm 4, thereby turning the latter about the back rod 7 as an axis. This pivotal movement of the arm 4carries the cutting edge of the tool 6 away'fromtheaxis of the record 3. In order to permit an easy manipulation of the rod 13, a lever 15 is.

secured to oneend thereof. Ajpin 16 se} cured to' the other end of the sald'bar prevents displacement thereof from the recess 12 and, in conjunction with a stop 17 preferably secured to the arm 4, limits the rotation of the said bar in an anti-clockwise 1 directiomas shown in Fig.1, when the arm .4 is in its elevated position. It is evident that the location, size, and cross'section of the bar 13 may be so chosen as to secure any cutting edge amount of movement of the tain the desired result. 'The desired amount of movement of the tool 6 may also be obtained by placing a member of theproper thickness between the opposite faces of the 7 bar 4 and'the straight edge 8 and later withdrawing this member.

Figs. am 8 inclusive.

InLFig'. 5, 18 is a fiat strip preferably made of sheet metal having a central portion members 21, 21 integral with the said section and adapted to engage thesides of, said arm, and two lips 22, 22 respectively integral with the said side members and adapted to be inserted between the bar 4 and the straight edge 8. Two ears'23, 23, preferably stamped outwardly from the side members 21, 21 respectively, are adapted tobe engaged by the fingers of the operator of the machine to shift the position of the strip 19.

In'the modification shown in Figs. 7 and 8, a vertical rod 24 having a knurled head 25 at one end and a transverse pin 26 at the other end is rotatably 'mounted'in the extension4. vByraising the arm 4, and rotating the. rod 24, the pin 26 can at will be either inserted between or withdrawn. from engagement with the said arm and the straight edgev 8. v A notch 27 in thearm 4 in which the upper part of the pin 26 is engaged when the said arm is in its raised position, prevents accidental displacement Several means 7 taking second cuts, for performing this operation are shown inthrough the clamp; 5 and locked in place, is

fed along the record to take a first or roughing cut. When it is desired to take a finishing out, the desired adjustment of the cutting *tool'can be obtained by lowering the arm '4 into engagement with the straight edge 8 either by raising the lever 15 when the modification shown in Figs. 1 to 4-inclusive is employed or by'removing the members inserted between the arm 4 and the straight edge whenjthe modifications shown in F igs'. 5 toj8 inclusive are employed {when the finishing out can be taken without fur- V V ther adjustment of the knife, 6. By the emof the tool 6'that may be necessary to at:-

ployment of the spring 11 for supporting the held firmly in screw. for both roughing and finishingcuts.

Whilemy improved attachment 'fis primarily des'g'ned ployed for such an adjustment when any out is being taken; In such a'case, the .arm4is engagement with the said arm being then lowered, the cut is taken.

Furthermore, while several meansfor carrylng my invention into efiect have been shown by me, various other means may be employed; and myinvention is limited only engagement with the feed. a

for adjusting the tool-in it may. obviously beem 'elevated, the tool isjplaced'very lightly in record surface,-and"the as defined by the" terms of'the appended.

claims. 7

Havingnow described myinvention what I claim as'new and deslre to secure-by Letters Patent of'the United States is as follows:

1; Ina device of the classlde'scribed, 'the v combination with a record support, of a shaving" knife,

supporting means for'said kni'fe,'said knife being adjustable with respect to said supporting means in a direc-' tion toward said record support, and positioning means comprising a cam member having a flattened'bearing surface, said posltioning means coacting with said supporting means and being operable without alteration of the position of said knife with respect to "said supporting means to cause movement of said knife toward saidrecord support an amount always equalto a'predetermined depth of cut stantially, as described. a 2.,The combination with port, of a shaving knife, for said knife, with respect to a frecord lsup supporting means for said knife, subsaid knifelbeing adjustable 1, 7 said supporting means in a position of said knife with respect to said.

supporting means to cause movement of said knife toward said record support an amount always equal to a predetermined depth of cut for said knife, and means for producing a relative feeding movement be- Copies of this patent may be obtained for tween said supporting means and said record support, said feed producing means being operative for diiferent positions of operation of said positioning means, substantially as described.

This specification signed and witnessed this 26th day of Dec. 1910.

K F. LATTA.

FRA Witnesses:

H. J. MAxFmLD, GEO. E. HARRIs.

five cents each, by addressing the Commissioner 0! Patents,

Washington, D. 0. 

